Accept the CSS-wide keywords for any property

cssutils/profiles.py

@@ -12,6 +12,10 @@
 from cssutils import util
 import re
 
+# The CSS-wide keywords are valid in place of the value of any property.
+# https://drafts.csswg.org/css-values-4/#common-keywords
+CSS_WIDE_KEYWORDS = 'inherit|initial|unset|revert'
+
 
 class NoSuchProfileException(Exception):
     """Raised if no profile with given name is found"""
@@ -168,10 +172,10 @@ def _compile_regexes(self, dictionary):
         for key, value in list(dictionary.items()):
             if not hasattr(value, '__call__'):
                 # Compiling them now will slow down the cssutils import time,
-                # even if cssutils is not needed. Thus, lazily compile them the
-                # first time they're needed.
+                # even if the cssutils is not needed. Thus, lazily compile them
+                # the first time they're needed.
                 # https://web.archive.org/web/20200701035537/https://bitbucket.org/cthedot/cssutils/issues/69)
-                value = util.LazyRegex('^(?:%s)$' % value, re.I)
+                value = util.LazyRegex('^(?:%s|%s)$' % (value, CSS_WIDE_KEYWORDS), re.I)
             dictionary[key] = value
 
         return dictionary

newsfragments/19.bugfix.rst

@@ -0,0 +1 @@
+Accept the CSS-wide keywords (initial, inherit, unset and revert) as the value of any property.

tests/test_cssfontfacerule.py

@@ -215,11 +215,12 @@ def test_valid(self):
             True: (
                 N,
                 N + 'font-style: italic; font-weight: bold',
+                # a CSS-wide keyword is valid for any property
+                N + 'font-style: inherit',
             ),
             False: (
                 '',
                 'font-family: x, y; src: local(x);',
-                N + 'font-style: inherit',
                 N + 'invalid: 1',
             ),
         }

tests/test_profiles.py

@@ -269,6 +269,12 @@ def test_csscolorlevel3(self):
             #     'color', color
             # )
 
+    def test_css_wide_keywords(self):
+        "the CSS-wide keywords are valid for any property"
+        for name in cssutils.profile.knownNames:
+            for keyword in ('inherit', 'initial', 'unset', 'revert'):
+                assert cssutils.profile.validate(name, keyword), (name, keyword)
+
     def test_validate(self):
         "Profiles.validate()"
         tests = {
@@ -431,6 +437,9 @@ def test_validate(self):
                 'color',
                 (
                     'inherit',
+                    'initial',
+                    'unset',
+                    'revert',
                     'black',
                     '#000',
                     '#000000',